Anyone know what this is?

I did a lot of yard work today - mostly mowing and weed whacking in tall grass. I didn’t grab any plants. When I was done I noticed a small bump between my first two knuckles on my hand and thought maybe it was a bug bite. I took a Benadryl and put on some hydrocortisone cream because it was itchy.

Over the past few hours it has swollen up and is crazy itchy. It’s not red or rashy and I don’t see the original bump anymore - just really swollen and itchy.

I’m not overly concerned about it, just have no idea what it could be. Some sort of bug bite with a mild allergic reaction? 🤷🏼‍♀️